Automatic time-switch.



J. JONES' SL-J. JoNBs,JR.

' AUTOMATIC TIME SWITCH. APPLICATION FILED 11313.13, 190s.

927,803. Y Patented Ju1y13,19o9.

i uw V" UNITED STATES PATENT oEEIoE.

I JAMESJONES AND 'JAMES JONES, JR., OF NEW YORK, N. Y.

AAUiroMA'rrc 'ruin-SWITCH.

.Specification of Letters Patent.

Patented July 13, 1909.

'Application med reb'ruary 1e, 190s. serial No. 415,687. y

which it appertains to make and use the' 'same'. i

Thls invention relates to that class 4of switches, controlling thecurrent flowing through an electric conductor, in which the switch ismanually set to close'the circuit and automatically thrown tozopen =thecircuit bly actuating means under the control of a c ook mechanism. v

In the accompanying drawing Figure 1 is a pers ective view of the deviceand Fig. 2 is a detall view of the latch.

Referring to the drawin 1 designates an electric switch of the `jack ifet e comprising the usual pivotally mounted lades 2 connected b anmsulated bridge member 3 and des' e to be turned on their pivots andengaged y jaws 4, springs 5 tendingto throw the blades 1nto the openposition and holdthem there. We have shown the bridge 3 equipped with aforwardly projecting lip or flange 6 and provided with a post 7preferablyhaving a rubber extremity designed to contact with a illow 8on the switch board when theswitc is thrown into its open position.

9 designates the clock mechanism by which the release of the blades fromtheir jaws is effected. We have shown the clock mechanism inclosed b ahousing 10 mounted on the switch boar and havin a hinged cover, thustending to prevent dust rom getting into the clock machinery whileaffording means for readily gainingl access to wind or ,adjust the clockand set t e automatic release. A plate 12is shown forming part of the suportingstructure of the clock. Through t 1s plate projects the shaftwhich rotates twice in twenty-four hours, that is, the shaft on whichthe hour hand of a time indicating clock would be mounted. We have showna dial or cam disk 13 mounted upon and' movable with this shaft andcapable of being axially' adjusted by loosening a milled wheel 14 whichnormally holds the disk in its fixed position on the shaft. Theperiphery of the disk is graduated to indicate the extent of itsrotation during an hour and a half hour, the series of longer radialserrationsy 15m911king the hours and thel series of rintermediateshorter serrations 16 indicating., the Vhalf hours. At a point on itsperiphery thedisk is formed with a cam surface'17. A laterally movablearm 18 is shown mounted on plate 12 in proximity to the disk,being'fulcrumed at its center on a base 19 secured to the. plate andequipped with a stop .2O limiting the v movement ofthe extension 21 ofthe arm to- The extension 21 carries a y ward the disk. pin. or stud 22at its free. end desi ned tobe engaged bythe cam surface 17 o thedisk,while thev extension 23 projects through an opening inthe housing andenga es apost24 on the upper end ofy a vertical y mounted, axiallymovable sleeve 25. This sleeve is shown supported by and inclosing ashaft 26 mounted on the switch board.. The sleeve carries a block 27 atits lower end on one side of which is secured a hammer 28 while a spring29 is shown secured to the other side of the block.

The latch-releasing lever 30 is shown fulcrumed upon shaft 26 beneaththe block 27 and laterally movable in one direction` under the tensionof a sprinflr 31 and in the other under the impact of the hammer 28. Thefree end of the lever 30 normally engages a latch 32 by which the switchblades are held in engagement with their jaws. This latch com rises abase ortion 33 having ears 34 in whic is mounte the rocking or tripmember 35 having a hooked portion 36 desi ned to enga e the lip orilange 6 onthe switc The trip as an extension 37 projectin rearwardlyfrom the hook and between t is extension and the base 33 is normallyheld the Ifree end of lever 30, the spring 31 tending to hold it in thatposition. The latch is provided with a coil s ring 38 tending to turnthe trip into the oi position, that is, tending to tilt it and releasethe blades when lever 30 is removed from its position between the tripand the base.

In o eration the switch is manually set to close the circuit by movingits blades into engagement with their respective jaws. In this closingmovement the lip 6 in engaging hook 36 tilts the tri l35 as against theten-y sion of spring 38. his allows spring 31 to draw the lever 30 intoits position between the tri and the base, thus holding the trip so thatt ie latch cannot release the switch unless or until the lever is movedfrom the latch. The disk 13 is then adjusted so that the desired timeshall elapse before the cam surface 17 rocks and releases arm 18. Thisrocking of the arm occasioned by the cam surface pushing on the stud 22turns the.

sleeve 25 and draws the hammer away from the lever against the tensionof spring 29. When the cam surface suddenly releases the stud 22 thisdirection of movement is reversed and thev hammer is forcibly swungagainst the lever 30, causing the latter to move out of engagement withthe latch 32 and allowing the trip 35 to tilt under the action of spring38, releasing the switch and cutting oli the electric current.

We claim as our invention 1. In an automatic time switch, the combination With the switch, of a latch designed to hold the switch in oneposition, a lever nor-` mally co-acting with said latch to hold thelatter in engagement with the switch, a clock mechanism, a cam diskmovable therewith a spring held arm designed to be moved hy said camagainst the tension of its spring, and a hammer actuated by the movementof said arm to strike said lever and throw it out of engagement withsaid latch.

2. In an automatic time switch, the combination with the switch board orbase plate and the switch blades pivotally mounted thereon, of a latchon said plate designed to lock said switch, a shaft mounted on saidplate, a lever fulcrumed on said shaft, a spring tending to hold saidlever in engagement with said latch to maintain the latter in lockingrelation to said switch, a sleeve inclosing saidl shaft, a hammercarried by said sleeve and designed to contact with said lever to removeit from engagement with said latch, a housing or casing mounted on saidplate, clock mechanism therein, an arm pivotally mounted within saidhousing and eX- tending outwardly therefrom into engagement with saidsleeve, and means operated by the clock mechanism for moving said arm toturn said sleeve and actuate said ham-mer.

In testimony whereof, we have signed this specification in the presenceof two subscribing witnesses.

JAMES JGNES. JAS. JONES, JR. Witnesses:

HUGO GROW, HENRY SOHULLERMANN.

